<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width,initial-scale=1.0" />
        <title>Document</title>
    </head>
<body>
    <div id = 'app'>
  <ul>
      <li v-for ='(item,index) in userList'>
        序号：{{index+1}} 姓名：{{item.username}} 年龄：{{item.age}}
      </li>
  </ul>
    </div>
<script src = 'vue.js'></script>
<script>
    new Vue({
        el:'#app',
        data () {
            return {
                userList: [
                    {username:'张三',age: 19},
                    {username:'李四',age:20}

                ]
            }
        }
    })
</script>
</body>
</html>